--- Makefile.proto	2015-07-21 23:15:10.000000000 +0300
+++ Makefile	2019-05-09 20:08:49.139698846 +0300
@@ -31,8 +31,8 @@
 # If using OpenSSL, uncomment the following 3 lines.
 ##
 #CRYPTO_CFLAGS =
-#CRYPTO_OBJS   = secure_random_openssl.o
-#CRYPTO_LIBS   = -lcrypto
+CRYPTO_OBJS   = secure_random_openssl.o
+CRYPTO_LIBS   = -lcrypto
 
 ##
 # If using cryptlib, uncomment the following 3 lines.
@@ -45,7 +45,7 @@
 # Change PREFIX to install to different directories. The binary is installed
 # in $PREFIX/bin, and the man in $PREFIX/man/man1
 ##
-PREFIX = /usr/local
+PREFIX ?= /usr
 
 ##
 # On some operating systems (most notably Linux 2.6 kernels) using mlockall
@@ -60,12 +60,13 @@
 # Sometimes you have only dynamic libraries available. In that case COMMENT
 # the following line.
 ##
-LINK_STATIC = -static
+#LINK_STATIC = -static
 
 ##############################################################################
 # NO USER MODIFIABLE PARTS AFTER THIS POINT
 ##############################################################################
-CFLAGS	= -Wall $(CRYPTO_INCLUDE_PATH) $(CRYPTO_CFLAGS) $(NO_MLOCKALL)
+CFLAGS	:= ${CFLAGS} -Wall $(CRYPTO_INCLUDE_PATH) $(CRYPTO_CFLAGS) $(NO_MLOCKALL)
+#LDFLAGS on my system results in libcrypto catching SIGSEGV
 LDFLAGS	= $(CRYPTO_LIBRARY_PATH) $(LINK_STATIC) $(CRYPTO_LIBS) -lm
 
 .PHONY : all install-strip install clean 
@@ -75,8 +76,9 @@
 
 all: secpwgen
 
+#libcrypto catches SIGSEGV if linked with cc.
 secpwgen: $(OBJS)
-	$(CC) -o $@ $(OBJS) $(LDFLAGS)
+	$(CXX) -o $@ $(OBJS) $(LDFLAGS)
 
 install-strip: secpwgen
 	strip secpwgen